HydraMaster RX-20 700-041-006, Owner'S Manual, Page: 49 / 52

10-1: Troubleshooting
RX-20
10 - Troubleshooting
Low Vacuum Flow at the Cleaning Heads
1.0
Possible Cause Solution
1.1 Hub not sealing properly. Replace felt seal with a lubricated one.
1.2 Restricted air flow.
Remove hoses from the vacuum shoe and skid
assembly, and clear them of debris.
1.3 Low vacuum flow from power.
Refer to Troubleshooting section of source
equipment manual.
Low Water Flow at Cleaning Heads (indicated by irregular Water Temperature)
2.0
Possible Cause Solution
2.1 Restricted jets. Remove jets and clear them of debris.
2.2 Clogged water strainer. Remove water strainer and clean.
2.3 Kinked or clogged solution
hose. Remove hose. Repair or replace.
2.4 Cleaning hub not properly
threaded. Remove cleaning hub from shaft to shaft. Clean
and rethread onto shaft.
Water Leak at Rotary Union 3.0
Possible Cause Solution
3.1 foreign matter in rotary union
seal. dismantle rotary union. Clean. Re-assemble and
install.
Water Leak at Valve 4.0
Possible Cause Solution
4.1 Ruptured plunger or valve
O-ring. Repair or replace damaged plunger, O-ring, seal.
Check for freeze damage.
4.2 Ruptured plunger or valve
O-ring. Repair or replace damaged plunger, O-ring, seal.
Check for freeze damage.